/*
 * $Id: channel_manager.h 44 2011-02-15 12:32:29Z kaori $
 *
 * Copyright (c) 2002-2011, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
 * Copyright (c) 2002-2011, Professor Benoit Macq
 * Copyright (c) 2010-2011, Kaori Hagihara
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef   	CHANNEL_MANAGER_H_
# define   	CHANNEL_MANAGER_H_

#include <time.h>
#include "query_parser.h"
#include "cachemodel_manager.h"

//! Channel parameters
typedef struct channel_param{
  cachemodel_param_t *cachemodel; //!< reference pointer to the cache model
  char cid[MAX_LENOFCID];         //!< channel identifier
  // - a record of the client's capabilities and preferences to the extent that the server queues requests
  time_t start_tm;                //!< starting time
  struct channel_param *next;     //!< pointer to the next channel
} channel_param_t;


//! Channel list parameters
typedef struct channellist_param{
  channel_param_t *first; //!< first channel pointer of the list
  channel_param_t *last;  //!< last  channel pointer of the list
} channellist_param_t;


/**
 * generate a channel list
 *
 * @return pointer to the generated channel list
 */
channellist_param_t * gene_channellist();


/**
 * generate a channel under the channel list
 *
 * @param[in] query_param query parameters
 * @param[in] cachemodel  reference cachemodel
 * @param[in] channellist channel list pointer
 * @return                pointer to the generated channel
 */
channel_param_t * gene_channel( query_param_t query_param, cachemodel_param_t *cachemodel, channellist_param_t *channellist);

/**
 * set channel variable parameters
 *
 * @param[in]     query_param query parameters
 * @param[in,out] channel     pointer to the modifying channel
 */
void set_channel_variable_param( query_param_t query_param, channel_param_t *channel);

/**
 * delete a channel
 *
 * @param[in] channel address of the deleting channel pointer
 * @param[in,out] channellist channel list pointer
 */
void delete_channel( channel_param_t **channel, channellist_param_t *channellist);


/**
 * delete channel list
 *
 * @param[in,out] channellist address of the channel list pointer
 */
void delete_channellist( channellist_param_t **channellist);


/**
 * print all channel parameters
 *
 * @param[in] channellist channel list pointer
 */
void print_allchannel( channellist_param_t *channellist);


/**
 * search a channel by channel ID
 *
 * @param[in] cid         channel identifier
 * @param[in] channellist channel list pointer
 * @return                found channel pointer
 */
channel_param_t * search_channel( char cid[], channellist_param_t *channellist);
#endif 	    /* !CHANNEL_MANAGER_H_ */